Trusted Since 1919
U.S. Manufacturer of Perlite, Vermiculite, & Custom Blended Products
Whittemore is a reliable and trusted supplier across horticultural, swimming pool, construction, industrial, filtration, and environmental markets.
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Built to Perform.
Proven on the Job.
For over a century, Whittemore has produced expanded vermiculite and perlite engineered for demanding applications. Our controlled processing delivers clean, consistent materials with repeatable performance at scale.
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Find the Right Mineral for your Industry
Whittemore's expanded perlite and vermiculite support demanding applications across horticulture, construction, industrial, environmental, and pool markets.
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Latest from the Blog
Perlite vs. Vermiculite: Which Is Right for Your Application?
Both minerals improve soil and insulation , but they work differently. Here's how to choose the right one for your project.
Why Vermiculite Is the Industry Standard for Pool Bottoms
A smooth, durable pool bottom starts with the right base material. Learn why vermiculite outperforms sand and concrete alternatives.
How Whittemore Approaches Sustainable Mineral Processing
From traceable sourcing to energy-efficient expansion, sustainability is built into how we manufacture perlite and vermiculite.
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